/*
 * Copyright (c) 2023-2025 elsfs Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.elsfs.cloud.starter.excel.processor;

import java.lang.reflect.Method;
import org.springframework.context.expression.MethodBasedEvaluationContext;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;

/** 名称Spel表达式处理器 */
public class NameSpelExpressionProcessor implements NameProcessor {

  /** 参数发现器 */
  private static final ParameterNameDiscoverer NAME_DISCOVERER =
      new DefaultParameterNameDiscoverer();

  /** Express语法解析器 */
  private static final ExpressionParser PARSER = new SpelExpressionParser();

  @Override
  public String doDetermineName(Object[] args, Method method, String key) {

    if (!key.contains("#")) {
      return key;
    }

    EvaluationContext context =
        new MethodBasedEvaluationContext(null, method, args, NAME_DISCOVERER);
    final Object value = PARSER.parseExpression(key).getValue(context);
    return value == null ? null : value.toString();
  }
}
